Disconnect the air control valve electrical connector from the throttle body.

Inspect the auxiliary air control valve attached to the intake manifold, and make sure it is closed.

Access the idle adjusting screw located at the side of the throttle body and rotate to adjust the idle.

When complete, connect all hoses plugged earlier.

Remove the tachometer.

2.5L & 3.3L Engines

Position gear selector lever in the
N
position on vehicles equipped with manual transaxles, and in the
P
position on vehicles equipped with automatic transaxles.

Check and make sure the ignition timing is correct, the spark plugs are gapped correctly and in good condition, and the air filter is clean.

Inspect all vacuum hoses for any leaks, and repair if needed.

Check and make sure the CHECK ENGINE light does not illuminate.

Connect the Subaru select monitor to the harness located under the left side of the dash. When connected use mode F04 for this procedure.

WARNING

When connecting the Subaru select monitor, make sure the ignition is OFF, or damage could occur to the monitor and or ignition components.

With all accessories
OFF
, check the idle speed. The idle range should be 600-800 rpm.

Check the idle speed when loaded by turning
ON
the headlights, rear defroster and A/C. The idle range should be 800-900 rpm. If not, diagnose and correct the problem in the fast idle control device (FICD) system.

WARNING

If the idle speed is not within specification range, DO NOT turn the idle adjusting screw. If repairs to the FICD do not restore the idle to specification, consult an authorized dealer for additional repairs.